Dexamethasone suppresses gene expression and production of IL-13 by human mast cell line and lung mast cells

Toshiaki Fushimi, Hiroshi Okayama, Sanae Shimura, Hiroki Saitoh, Kunio Shirato

研究成果: Article査読

28 被引用数 (Scopus)

抄録

Background: IL-13 has been shown to induce IgE production in B cells by promoting class switching to IgE. Mast cells are known to play an important role in the pathogenesis of allergic diseases. We evaluated the ability of human mast cells to produce IL-13 using human mast cell line HMC-1 and freshly isolated lung mast cells and then examined the effect of dexamethasone on the gene expression and production of IL-13 by these cells. Methods: HMC-1 cells and lung mast cells were cultured with 10 ng/ml phorbol 12-myristate 13-acetate (PMA) and 1 μmol/L ionomycin and with 5 μg/ml phytohemagglutinin (PHA) and 10 ng/ml PMA, respectively, in the presence of dexamethasone. The gene expression of IL-13 at 3 hours (HMC-1 cells) or 12 hours (human lung mast cells) after stimulation was assessed semiquantitatively by sequential reverse transcription-polymerase chain reaction and Southern blot analysis. IL-13 production at 12 hours after stimulation was assayed by ELISA. Results: The gene expression of IL-13 by HMC-1 cells and human lung mast cells, which was detected at a low level in an unstimulated condition, was increased by PMA/ionomycin and suppressed by dexamethasone. The supernatant of HMC-1 cells and human lung mast cells showed a low level of IL-13, which was increased by the stimulation and suppressed by dexamethasone. Conclusion: These findings indicate that HMC-1 cells and human lung mast cells produce IL-13 and that dexamethasone suppresses the production of IL-13 by these cells through an inhibitory action on the gene expression.

本文言語English
ページ(範囲)134-142
ページ数9
ジャーナルJournal of Allergy and Clinical Immunology
102
1
DOI
出版ステータスPublished - 1998

ASJC Scopus subject areas

  • 免疫アレルギー学
  • 免疫学

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